Effects of altitude on leaf ecological stoichiometry of Stellera chamaejasme in the Qilian Mountains

doi:10.7522/j.issn.1000-694X.2021.00113

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (6): 205-212.DOI: 10.7522/j.issn.1000-694X.2021.00113

Effects of altitude on leaf ecological stoichiometry of Stellera chamaejasme in the Qilian Mountains

Haohai Su¹(), Xiaofang Zhang²^,³, Yalin Niu¹, Hairu Wang¹, Jianjun Cao¹^,⁴()

^1.College of Geography and Environmental Science，Northwest Normal University，Lanzhou 730070，China
^2.Key Laboratory of Eco-hydrology of Inland River Basin，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^3.University of Chinese Academy of Sciences，Beijing 100049，China
^4.Gansu Engineering Research Center of Land Utilization and Comprehension Consolidation，Lanzhou 730070，China

Received:2021-08-06 Revised:2021-09-03 Online:2021-11-20 Published:2021-12-17
Contact: Jianjun Cao

Abstract

Abstract:

Altitude is the main topographic factor affecting the distribution of plants and their physiological and ecological adaptability. Studying the response of leaf ecological stoichiometry to altitude at the species level can reveal the adaptation strategies of this species to the environment and the effect of shaping environment. Through a comparative study of the leaf carbon （LC） content， nitrogen （LN） content， phosphorus （LP） content， as well as their ratio of Stellera chamaejasme at different altitudes （2 400， 2 600， 2 800， 3 000 and 3 200 m） in the middle part of Qilian mountains， it was found that with the increase of altitude， LC content of S. chamaejasme first decreased， then increased， and then decreased again， with the maximum value being 471.00 g·kg^-1 （3 000 m） and the minimum value being 410.73 g·kg^-1 （3 200 m）. The LN content decreased first and then increased with the increase of altitude， and the maximum and minimum were 35.15 g·kg^-1 （3 200 m） and 29.83 g·kg^-1 （2 600 m）， respectively. The change trend of LP was generally consistent with that of LN， and the maximum and minimum of LP content were 1.73 g·kg^-1 （3 200 m） and 0.98 g·kg^-1 （2 800 m）， respectively. LC∶LN first increased and then decreased， LC∶LP and LN∶LP first decreased then increased and then decreased again. Annual average temperature， annual precipitation and the ratio of soil organic carbon to total nitrogen were the main factors affecting the variation of leaf ecological stoichiometry of S. chamaejasme. The results suggested that altitude affected leaf ecological stoichiometry of S. chamaejasme mainly by changing the distribution of water， heat and soil （soil C∶N）. In the meanwhile， S. chamaejasme adapted to elevation changes by adjusting leaf physiological structure.

Key words: Stellera chamaejasme, altitude, leaf, ecological stoichiometry, Qilian Mountains

CLC Number:

Q948.1

Haohai Su, Xiaofang Zhang, Yalin Niu, Hairu Wang, Jianjun Cao. Effects of altitude on leaf ecological stoichiometry of Stellera chamaejasme in the Qilian Mountains[J]. Journal of Desert Research, 2021, 41(6): 205-212.

Figures/Tables 6

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指标	海拔/m					F	P	df
指标	2 400	2 600	2 800	3 000	3 200	F	P	df
SOC/（g·kg^-1）	13.64±0.40^c	29.67±1.40^b	15.08±0.55^c	15.23±0.63^c	35.60±2.45^a	36.01	0.0000	4
STN/（g·kg^-1）	1.67±0.24^c	2.74±0.96^b	1.62±0.34^c	1.73±0.55^c	3.48±0.97^a	38.00	0.0000	4
STP/（g·kg^-1）	0.50±0.02^b	0.55±0.01^a	0.44±0.02^c	0.37±0.01^d	0.53±0.02^ab	31.05	0.0000	4
SOC:STN	8.21±0.13^d	10.33±0.22^a	9.40±0.18^bc	9.02±0.25^cd	10.08±0.25^ab	10.05	0.0000	4
SOC:STP	28.09±1.32^c	53.59±2.43^b	35.48±1.77^cd	41.94±1.69^d	67.50±3.83^a	20.02	0.0000	4
STN:STP	3.43±0.17^c	4.96±0.15^b	3.77±0.17^c	4.71±0.18^b	6.70±0.34^a	21.57	0.0000	4
LONG	100°21′55″	100°17′15″	100°14′28″	100°14′26″	100°22′35″	—	—	—
LAT	38°37′05″	38°33′43″	38°33′09″	38°33′22″	38°38′15″	—	—	—
MAT/℃	2.11	1.02	-0.07	-1.17	-2.28	—	—	—
MAP/mm	307.08	334.37	358.55	382.25	401.77	—	—	—

指标	海拔/m					F	P	df
指标	2 400	2 600	2 800	3 000	3 200	F	P	df
SOC/（g·kg^-1）	13.64±0.40^c	29.67±1.40^b	15.08±0.55^c	15.23±0.63^c	35.60±2.45^a	36.01	0.0000	4
STN/（g·kg^-1）	1.67±0.24^c	2.74±0.96^b	1.62±0.34^c	1.73±0.55^c	3.48±0.97^a	38.00	0.0000	4
STP/（g·kg^-1）	0.50±0.02^b	0.55±0.01^a	0.44±0.02^c	0.37±0.01^d	0.53±0.02^ab	31.05	0.0000	4
SOC:STN	8.21±0.13^d	10.33±0.22^a	9.40±0.18^bc	9.02±0.25^cd	10.08±0.25^ab	10.05	0.0000	4
SOC:STP	28.09±1.32^c	53.59±2.43^b	35.48±1.77^cd	41.94±1.69^d	67.50±3.83^a	20.02	0.0000	4
STN:STP	3.43±0.17^c	4.96±0.15^b	3.77±0.17^c	4.71±0.18^b	6.70±0.34^a	21.57	0.0000	4
LONG	100°21′55″	100°17′15″	100°14′28″	100°14′26″	100°22′35″	—	—	—
LAT	38°37′05″	38°33′43″	38°33′09″	38°33′22″	38°38′15″	—	—	—
MAT/℃	2.11	1.02	-0.07	-1.17	-2.28	—	—	—
MAP/mm	307.08	334.37	358.55	382.25	401.77	—	—	—

叶片化学计量	F	P	df
LC	13.17	0.000	4
LN	167.44	0.000	4
LP	9.10	0.000	4
LC∶LN	68.58	0.000	4
LC∶LP	9.83	0.000	4
LN∶LP	4.71	0.002	4

叶片化学计量	F	P	df
LC	13.17	0.000	4
LN	167.44	0.000	4
LP	9.10	0.000	4
LC∶LN	68.58	0.000	4
LC∶LP	9.83	0.000	4
LN∶LP	4.71	0.002	4

环境因子	轴1	轴2	R2	P^*	解释度/%	F	P^**
SOC	0.491	-0.871	0.09	0.008	1.5	2.5	0.141
STN	-0.269	-0.963	0.05	0.069	1.7	3.1	0.108
STP	0.994	-0.107	0.08	0.009	0.5	0.9	0.511
SOC∶STN	0.77	-0.638	0.25	0.001	7.9	12.4	0.006
SOC∶STP	-0.213	-0.977	0.09	0.005	1.5	2.8	0.099
STN∶STP	-0.881	-0.474	0.12	0.001	0.2	0.4	0.910
MAT/℃	0.984	0.176	0.57	0.001	27.2	38.5	0.006
MAP/mm	-0.987	0.176	0.57	0.001	5.6	9.5	0.006
pH值	-0.421	0.907	0.04	0.092	0.7	1.2	0.474

Effects of altitude on leaf ecological stoichiometry of Stellera chamaejasme in the Qilian Mountains

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叶片化学计量	MAT	SOC∶STN	MAP
LC	0.174	-0.320^**	-0.144
LN	-0.799^**	-0.395^**	0.771^**
LP	-0.435^**	-0.433^**	0.423^**
LC∶LN	0.748^**	0.105	-0.706^**
LC∶LP	0.461^**	0.391^**	-0.444^**
LN∶LP	0.327^**	0.398^**	-0.319^**

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